MPLX (MPLX) concentration risks

The company's disclosed concentration profile is dominated by a single counterparty relationship that operates at two distinct levels of the revenue base. Within the Crude Oil and Products Logistics segment, approximately 88 percent of segment revenues and other income was generated from MPC — a high share by disclosed size with a mixed character that reflects both the structural design of the partnership (MPC is the company's general partner and primary commercial anchor) and a dependency on MPC's throughput volumes and contractual commitments. At the total entity level, MPC accounted for 48 percent of total revenues and other income in 2025 — a moderate share by disclosed size, also with mixed character, illustrating that MPC's dominance at the segment level translates to a meaningful but not absolute share of the consolidated top line. The gap between the segment-level figure and the consolidated figure reflects the existence of third-party revenue streams that partially dilute MPC's footprint across the enterprise, even as the logistics segment itself is nearly entirely MPC-facing. This is meaningful context: the business has more commercial diversification at the consolidated level than the segment disclosure alone might suggest. The key risk in this profile is the degree to which volume throughput and fee commitments from MPC anchor or constrain the company's financial performance. A contraction in MPC's refining activity or a renegotiation of commercial terms could affect both the high-share segment and the consolidated result simultaneously.

For the engine’s reasoning on MPLX’s current verdict — including which dimensions drove the score — see the per-dimension breakdown.

Concentration counts reflect items disclosed in each peer’s most recent 10-K; disclosed-size classification uses TrendMatrix’s internal 10-K extraction taxonomy.